Rolling mill stand



4 Sheets-Sheet 1 Fild Nov. 27, 1963 Inventor? 4 Sheets-Sheet 2 FiledNov. 27. 1963 Jan. 17, 1967 w. BONHQFF 3,298,215

ROLLING MILL STAND Filed Nov. 27, 1963 4 Sheets-Sheet 3 wax W Inventor":

Jam 17, 1967 w. BONHOFF 3,298,215

ROLLING MILL STAND Filed Nov. 27, 1963 4 Sheets-Sheet 4 Fly. 7

I nvemarr beam of the stand is disposed behind the rolls.

and dismounted together with the rolls.

United States Patent M 3,298,215 ROLLING MILL STAND Willi Bonhoif,Essen, Germany, assignor to BeteiligungsundPatentverwaltungsgesellschaft mit beschrankter Haftung, Essen, Germany,a corporation of Germany Filed Nov. 27, 1963, Ser. No. 326,499 Claimspriority, application Germany, Nov. 29,1962, B 69,789 4 Claims. (Cl.72-238) The present invention relates to rolling mill stands, the rollsof which are disposed in stand accessories connected with the stand fora swiveling movement.

An up-set stand for rolling mills is known, in which the up-set rollsare mounted freely floating at the lower end of. axles which areuprightand rotatable in roller bearings and each of the two stands, carryingthe axle of the upset rolls, can be swiveled with the rolling mill standabout a horizontal axis and, furthermore, is adjustable perpendicularlyto the axis of the roll. Each up-set roll is connected with a drivemotor in this up-set stand which motor is disposed together with thecorresponding gear drive on a housing receiving the upset rolls.

This rolling mill shows though an appreciably smaller design than theknown up-set stands, wherein the np-set rolls are. mounted in slideswhich move in guides of the horizontally disposed rolling mill standsand wherein long drive shafts and jointed spindles are required for thedrive of the rolls. It has, however. the drawback that the arrangementsof the stands, swiveling about a horizontal axis and carrying the upsetrolls, permit only a relatively neglectable clearance of the up-setrolls. Such up-set mill stands are, therefore, suitable only for theworking of narrow profiles, bands or wires, where an exactlyrectangularcross-section is of no great matter.

It is one object of the present invention to provide a rolling millstand which avoids the drawbacks of the previously mentioned stands forup-set rolls and which is also suitable for the working of rollingmaterial of larger dimensions.

It is another object of the present invention to provide a rolling millstand which includes stand accessories receiving the rolls and beingconnected with the rolling mill stand to swivel about vertical axes, inorder to create a still more simple and operatively safe construction.

It is still another object of the present invention to provide a rollingmill stand wherein one single stand is arranged which is designed as aclosed frame to which the stand accessories transfer the roller pressureby means of pressure spindles, the stand accessories swiveling aboutvertical axes.

Suitably the rolling mill stand is inclined in the direction of rolling,such that the upper cross beam of the stand is disposed in front of therolls and the lower cross By this arrangement the stand accessories caneasily be mounted Suitably the stand accessories are mounted togetherwith the rolls, on the one hand, in the upper cross beam of the standand, on the other hand, in a lifting tie, which is connected for liftingand lowering, respectively, with the stand for the rolls.

Upon application of the present invention to vertical up-set stands, thedrive of the rolls is suitably brought about by drive motors standing onthe stand accessories,

and by intermediate drives disposed in the stand accessories. Thelongitudinal axis of the drive motors, the swiveling axis of the standaccessories and the axis of the rolls form a triangle in a top plan viewthereof.

With these and other objects in view which will become apparent in thefollowing detailed description, the

Patented Jan. 17, 1967 present invention will be clearly understood inconnection with the accompanying drawings, in which:

FIGURE 1 is a front elevation of a vertical up-set rolling mill stand,partly in section;

FIG. 2 is a section taken along the lines 22 of FIG. 1;

FIG. 3 is a top plan view of the rolling mill stand disclosed in FIG. 1,partly broken away for a better demonstration;

FIG. 4 is a front elevation of a second embodiment of a rolling millstand;

FIG. 5 is a section along the lines 55 of FIG. 4;

FIG. 6 is a top plan view of the stand disclosed in FIG. 4;

FIG. 7 is a section along the lines 77 of FIG. 3; and

FIG. 8 is a section along the lines 8-8 of FIG. 3.

Referring now to the drawings, and in particular to FIGS. '1 to 3, therolling mill stand comprises a frame 1 which is in its front elevationof a portal-like design. The stand accessories 3 are mounted in theframe 1 to swivel about vertically disposed axes 2, whereby the standaccessories 3 receive up-set rolls 4. The latter are mountedtogetherwith their drive shaft 5 in the stand accessories 3 by means ofball and roller bearings 6, 7 and 8, such that after swiveling out ofthe stand accessories 3 the up-set rollers 4 can easily be dismounted inupward direction. The driving motors 9 are arranged on the standaccessories 3 in an upright position and are connected with the driveshafts 5 by means of a spur gear drive including the gears 10, 11 and12. The swivel axis 2 forms jointly with the longitudinal axis of thedriving motor 9 and the axis of the drive shaft 5 a triangle seen in aplan view and indicated in FIG. 3 by the letters A, B and C. A rollerpath 13 is provided for the feeding of the goods to be rolled. Drivemotors 14 and 15 are provided laterally of the frame 1 which cause thelateral swiveling of the stand accessories 3 and the setting of theup-set rolls 4 by means of an intermediate gear drive 16 and pressurespindles 17 having pressure members 18. The intermediate gear drives 16are interconnected by a shaft 19 which serves the purpose ofsynchronization of the lateral setting of the oppositely disposed up-setrolls 4.

Referring now to FIGS. 4 to 6, which. disclose a second embodiment ofthe stand, the rolling stand 20 is of a yoke-like structure and isinclined forwardly in rolling direction for an angle of about 45. Thestand accessories 23 are mounted to swivel about bolts 22 secured in anupper cross beam 21 of the stand 20, which stand accessories 23 receivethe rolls 24. The bolts 22, about which the stand accessories '23swivel, are furthermore mounted in lifting beams 25, which can be liftedand lowered, respectively, by means of a liftnig device 26, whereby thestand accessories 23 form an open U in this embodiment. Upon lowering ofthe lifting beams 25, the stand accessories 23 can be dismantled in thesimplest manner later-ally together with the bolts 22 and the rolls 24beyond the lower cross beam 27 of the rolling stand 20.

Pressure screws 28 are provided, against which the stand accessories 23are supported in the rolling stand 20. A setting device 29 for thepressure screws 28 is arranged. The rolls 24 are driven by drive motors(not shown) and by a gear drive and jointed spindles, which areconnected with the engagement ends 30 of the rolls 24.

Returning devices 31 are further arranged in the lateral posts of therolling stand 20 which serve the purpose of pressing the standaccessories 23 against the rolling stands 20 by means of the pressurescrews 28 without play.

The horizontal distance between the upper cross beam 21 and the lowercross beam 27 of the rolling stand 20 is chosen such that the drivingparts can be dismounted in upward direction upon removal of the rolls 24With the stand accessories 23.

While I have disclosed several embodiments of the present invention, itis to be understood that these embodiments are given by example only andnot in a limiting sense, the scope of the present invention beingdetermined by the objects and the claims.

I claim:

1. A rolling mill stand comprising a frame,

stand accessories mounted in said frame to swivel about a vertical axis,and a roll secured in each of said stand accessories and swiveling withthe latter about said vertical axis said frame comprising a closed yoke,pressure spindles operatively projecting laterally from said frame forengagement with said stand accessories, thereby transferring the rollingpressure from W projection in front of said rolls and sat-id lower cross9 beam being disposed behind said rolls. 2. The rolling mill stand, asset forth in claim '1, Wherein said frame comprises an upper cross beamand a lower cross beam,

means for lifting and lowering, respectively, said lower cross beam,

bolts mounted in said upper cross beam and in said lower cross beam, and

said stand accessories swiveling about said bolts.

3. The rolling mill stand, as set forth in claim 1, which includes adrive motor mounted with its driving axis in vertical direction on topof each of said stand accessories, and

a reduction gear drive operatively connected with each of said drivemotors and disposed in said stand accessones.

4. The rolling mill stand, as set forth in claim 3,

wherein I v the driving axis of said .drive motors, the swinging axis ofsaidstand accessories and the longitudinal axis of said form in a planview the corners of an imaginary triangle.

References Cited by the Examiner J. HERBST, Primary Examiner.

LIA. LARSON, Assistant Examiner.

1. A ROLLING MILL STAND COMPRISING A FRAME, STAND ACCESSORIES MOUNTED INSAID FRAME TO SWIVEL ABOUT A VERTICAL AXIS, AND A ROLL SECURED IN EACHOF SAID STAND ACCESSORIES AND SWIVELING WITH THE LATTER ABOUT SAIDVERTICAL AXIS, SAID FRAME COMPRISING A CLOSED YOKE, PRESSURE SPINDLESOPERATIVELY PROJECTING LATERALLY FROM SAID FRAME FOR ENGAGEMENT WITHSAID STAND ACCESSORIES, THEREBY TRANSFERRING THE ROLLING PRESSURE FROMSAID STAND ACCESSORIES TO SAID FRAME,